A fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter

Abstract

This utility model belongs to the field of wind turbine generator converter heat dissipation technology, and discloses a fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter. The device includes a control cabinet, which consists of a cabinet body and a door. The control cabinet contains multiple contactors, fan motors, and temperature sensors. Each contactor controls the start and stop of one fan motor. The contactors are electrically connected to a manual selector switch for adjusting the connection mode of the contactor control coil via a control circuit for controlling the contactor's on / off state. The contactor's control coil is connected to the control circuit via the manual selector switch. The manual selector switch has two positions, 1 and 2, for starting different fan motors. Positions 1 and 2 are symmetrically arranged. The starting sequence of the different fan motors is as follows: when the manual selector switch is in position 1, fan motor #1 starts first. This utility model achieves average utilization of the fan motors by periodically switching the fan starting sequence, thereby extending their service life.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for wind turbine generator converters, and in particular to a fan switching device for a water-cooled heat dissipation system for a wind turbine generator converter. Background Technology

[0002] In the water-cooled heat dissipation system of wind turbine generator converter, two cooling fans are usually provided. The fan start-up sequence is usually based on temperature setpoints: when the temperature reaches the first setpoint, fan No. 1 starts, when the temperature reaches the second setpoint, fan No. 2 starts, and so on. However, this fixed start-up sequence will cause fan No. 1 to be used frequently, shortening its lifespan, while the other fans are used less frequently. Therefore, we propose a fan switching device for the water-cooled heat dissipation system of wind turbine generator converter. Utility Model Content

[0003] In view of the problem that the fixed start-up sequence leads to frequent use of fan number 1, shortening its lifespan, while other fans are used less frequently, this utility model is proposed.

[0004] Therefore, the purpose of this utility model is to provide a fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter. The purpose is to achieve periodic switching of the fan starting sequence by adjusting the position of the control coil of the fan starting contactor. At the same time, the operator can periodically go to the site to manually switch the connection mode of the contactor control coil to change the fan starting sequence, so as to achieve the purpose of evenly utilizing the fan motor.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter includes a control cabinet. The control cabinet consists of a cabinet body and a cabinet door. The control cabinet contains multiple contactors, fan motors, and temperature sensors. Each contactor controls the start and stop of one fan motor. The contactors are electrically connected to a manual selector switch for adjusting the connection mode of the contactor control coil via a control circuit for controlling the on and off of the contactors.

[0007] As a technical solution of the fan switching device of the water-cooled heat dissipation system of the wind turbine generator converter described in this utility model, the control coil of the contactor is connected to the control circuit through the manual changeover switch.

[0008] As a technical solution of the fan switching device of the water cooling heat dissipation system of the wind turbine generator converter of this utility model, the manual changeover switch is provided with a gear 1 and a gear 2 for starting different fan motors, and the gear 1 and gear 2 are symmetrically arranged.

[0009] As a technical solution of the fan switching device of the water cooling heat dissipation system of the wind turbine generator converter of this utility model, the starting order of the different fan motors is as follows: when the manual switch is in position 1, fan motor #1 starts first, and fan motor #2 starts second.

[0010] When the manual selector switch is in position 2, fan motor #2 starts first, and fan motor #1 starts second.

[0011] As a technical solution of the fan switching device of the water cooling heat dissipation system of the wind turbine generator converter of this utility model, the control cabinet adopts a double-sided door design, and the cabinet door is installed on the cabinet body through a hinge node. An auxiliary structure for auxiliary maintenance is provided between the cabinet door and the cabinet body.

[0012] As a technical solution of the fan switching device of the water cooling heat dissipation system of the wind turbine generator converter of this utility model, the auxiliary structure consists of a fixed plate installed on the cabinet door, a plug-in piece installed on the fixed plate, and an auxiliary rod. The auxiliary rod can be detachably installed on the plug-in piece and the cabinet.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. This utility model can achieve average utilization of the fan motor by periodically switching the fan start-up sequence, thereby extending its service life.

[0015] 2. The manual switch of this utility model is simple in design, making it easy for operators to understand and operate.

[0016] 3. This utility model eliminates the need for a complex automatic control system, thereby reducing system costs and maintenance difficulty.

[0017] 4. This utility model has a simple manual switching system structure, low failure rate, and high reliability.

[0018] 5. This utility model, by adopting a double-sided door design for the control cabinet, enables front and rear operations to be carried out separately during maintenance, thereby reducing operation time and improving the heat dissipation effect inside the control cabinet. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the control cabinet structure of the fan switching device in the water-cooled heat dissipation system of the wind turbine generator converter of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal wiring of the original control cabinet.

[0022] Figure 3 This is a schematic diagram of the improved control circuit wiring inside the control cabinet of the fan switching device of the water-cooled heat dissipation system of the wind turbine generator converter of this utility model.

[0023] Figure 4 This is a schematic diagram of the manual switch structure of the fan switching device in the water-cooled heat dissipation system of the wind turbine generator converter of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Manual selector switch; 4. Contactor; 5. Fixing plate; 6. Connector plate; 7. Auxiliary rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0029] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] Reference Figures 1-4 A fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter is provided. This fan switching device includes a control cabinet, which consists of a cabinet body 1 and a cabinet door 2. The control cabinet contains multiple contactors 4, fan motors, and temperature sensors. The temperature sensors are used to monitor the temperature of the converter heat sink to trigger the start of the fan. Each contactor 4 controls the start and stop of one fan motor. The contactors 4 are electrically connected to a manual changeover switch 3 for adjusting the connection mode of the control coil of the contactor 4 through a control circuit for controlling the on and off of the contactors 4. The control circuit can control the on and off of the contactors 4 according to the temperature signal and the state of the manual changeover switch 3.

[0031] Reference Figure 3 The control coil of contactor 4 is connected to the control circuit via manual changeover switch 3. In application, the operator periodically goes to the site to switch the position of manual changeover switch 3 to change the connection method of the control coil of contactor 4, thereby adjusting the fan start sequence.

[0032] Reference Figure 3 and Figure 4 The manual selector switch 3 is equipped with gear 1 and gear 2 for starting different fan motors, and gear 1 and gear 2 are symmetrically arranged.

[0033] Reference Figure 3 and Figure 4 The starting sequence of different fan motors is as follows: when the manual selector switch 3 is in position 1, fan motor #1 starts first, and fan motor #2 starts second.

[0034] When the manual selector switch 3 is in position 2, fan motor #2 starts first, and fan motor #1 starts second.

[0035] Reference Figure 1 The control cabinet adopts a double-sided door design, and the cabinet door 2 is installed on the cabinet body 1 through a hinge node. An auxiliary structure for auxiliary maintenance is provided between the cabinet door 2 and the cabinet body 1.

[0036] Reference Figure 1The auxiliary structure consists of a fixed plate 5 installed on the cabinet door 2, a plug-in piece 6 installed on the fixed plate 5, and an auxiliary rod 7. The auxiliary rod 7 can be detached and installed on the plug-in piece 6 and the cabinet body 1.

[0037] The working principle of this utility model is as follows: The operator switches the gear of the manual switch 3 once a month or quarter, and records the time and gear of each switch, as well as the operating status and temperature change of the fan. If the operator's manual switch 3 is in gear 1, fan #1 starts first and fan #2 starts next. If the operator's manual switch 3 is in gear 2, fan #2 starts first and fan #1 starts next. This achieves the periodic switching of the fan starting sequence and also achieves the purpose of evaluating the use of the fan motor.

[0038] When maintenance is required, the cabinet door 2 can be opened from both sides, and then the auxiliary rod 7 can be inserted into the connector 6 and the cabinet body 1 to assist in opening the cabinet door 2. This allows for separate front and rear operations, reducing work time and improving the heat dissipation effect inside the cabinet body 1. This enhances the convenience of control cabinet maintenance and operation, and also improves the heat dissipation and ventilation effect of the control cabinet.

[0039] This utility model provides a fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter. By adjusting the connection method of the control coil of contactor 4, the fan starting sequence can be switched periodically, so as to achieve the purpose of even utilization of the fan motor, extend the service life of the fan, and has high practicality and economy.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fan switching device for a water-cooled heat dissipation system of a wind turbine generator converter, characterized in that: The control cabinet consists of a cabinet body (1) and a cabinet door (2). The control cabinet contains multiple contactors (4), fan motors and temperature sensors. Each contactor (4) controls the start and stop of one fan motor. Each contactor (4) is electrically connected to a manual selector switch (3) for adjusting the connection mode of the control coil of the contactor (4) through a control circuit for controlling the on and off of the contactor (4).

2. The fan switching device for the water-cooled heat dissipation system of the wind turbine generator converter according to claim 1, characterized in that: The control coil of the contactor (4) is connected to the control circuit via the manual changeover switch (3).

3. The fan switching device for the water-cooled heat dissipation system of the wind turbine generator converter according to claim 1, characterized in that: The manual selector switch (3) is provided with gear 1 and gear 2 for starting different fan motors, and gear 1 and gear 2 are symmetrically arranged.

4. The fan switching device for the water-cooled heat dissipation system of the wind turbine generator converter according to claim 3, characterized in that: The starting sequence of the different fan motors is as follows: when the manual selector switch (3) is in position 1, fan motor #1 starts first, and fan motor #2 starts second; When the manual selector switch (3) is in position 2, fan motor #2 starts first, and fan motor #1 starts second.

5. The fan switching device for the water-cooled heat dissipation system of the wind turbine generator converter according to claim 1, characterized in that: The control cabinet adopts a double-sided door design, and the cabinet door (2) is installed on the cabinet body (1) through a hinge node. An auxiliary structure for auxiliary maintenance is provided between the cabinet door (2) and the cabinet body (1).

6. The fan switching device for the water-cooled heat dissipation system of the wind turbine generator converter according to claim 5, characterized in that: The auxiliary structure consists of a fixing plate (5) installed on the cabinet door (2), a plug-in piece (6) installed on the fixing plate (5), and an auxiliary rod (7). The auxiliary rod (7) can be detachably installed on the plug-in piece (6) and the cabinet body (1).

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